Sayyiduna Abu Hurayrah (may Allah be pleased with him) narrated: Sayyiduna Ja'far (may Allah be pleased with him) loved the poor. He would sit with them, talk to them, and they would talk to him, and the Messenger of Allah (peace and blessings be upon him) used to call him "Abu al-Masakin" (father of the poor).
Hadith Referenceالمعجم الكبير للطبراني / باب الجيم / 1464